Dynamo-electric machine.



J. B. WIARD.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED APR. 21, 1910.

Patented Dec. 6, 1910.

Ms ATTUHNEX JNYE'NTDR. Jar-m! 2:7. mm.

WZNESEEE' m a: iZZZ UNITED STATES PTENT OFFICE.

JOHN B.. WIARD, 0F LYNN, MASSACHUSETTS, ASSIGNOR TO GENERAL, ELECTRICCOMPANY, A CORPORATION OF NEW YORK.

DYNAMO-ELECTBIC MACHINE.

Speciflcation of Letters Patent;

Patented Dec. 6,1910.

Application fl'led Aprils 27, 1910. Serial No. 557,549.

5 setts, have invented certain new and useful ImprovementsinDynamo-Electric Machines, of which the following is a specifica tion. l

My invention relates to dynamo electric machines and more particularlyto an arrangement for keeping such machines cool. In dynamo electricmachines, which are totally 'inclosed so thatthey may be used where itis desirable not to have any communication between the interior of thema+ chine and the surrounding medium, as for' tionary core structure forreceiving the cooling fluid, which holes register with grooves in theend frames between which the core.

structure is clam ed, channels being provided in the end rames forconnecting the; grooves to the exterior of said endframes,"

'one of the channels being an inlet and the other an outlet for thecoolingfluid:

Other features of novelty which characterize my invention are pointedout with particularity in the claims annexed to and forming a part ofthis specification.

For a better understandin of my invention, reference may be had to thefollowing description taken in connection with the accompanying drawingin which Figure 1 is a sectional view of a dynamo electric machineembodying my invention, and Fig. 2 is a sectional view of the machineofFig. 1 taken on the line'2-2 and looking .in the direction'of thearrows.

Referring to the drawing, the stationary core structure is built up oflaminations l havin holes extendin receivmg'the coolin fl preferablyarrange in a circle. The lami- 5 nations 1 are clamped between endframes t e hr g for These holes are 3, each of which has a circulargroove 4 registering with the holes 2 and a channel 5 connecting thegroove to the exterior of the end frame; In the ends of the channels aresecured pipes 6 and 6. The pipe 6 is the inlet and the pipe 6 is theoutlet for the cooling fluid. I preferably coat or cover the interiorwalls of the holes 2 with paint, japan, or other suitable material sothat the cooling fluid will not leak out between the laminations.The-holes are coatedwhenever the pressure under which the laminationsare assembled and fastened to" theend frames is not sufiicientlto makethe lamina tions into such a compact mass that the cooling fluid willnotleak out betweenthem. Bonnets 7, in which the armature shaft 8 isjournale'd, are fastened to the end frames 3,and form with thestationary core a totally .inclosed structure within which the rotororarmature 9, mounted on the shaft 8, rotates.

The cooling fluid enters the machine at the bottom through the inletpipe 6,flows through one of the channels 5, groove 4:, then through theholes 2, into the other groove 4, channel 5 and out of the outlet pipe6' at the top of the machine. The cooling fluid will run off from theoutlet pipe by gravity, and thus it will not be necessary to have thecooling flil id in the machine at a pressure greater t an a fewpounds.

When a machine in accordance with my invent-idn is used in the spinningroom of a cotton mill, which is necessarily. extremely damp and ,quitewarm, the pipe conveying the cooling fluid to the inlet pipe 6, willcondense moistfire if this pipe is much colder than the room. Thecondensed moisture will drip pfi the pipe and may cause a great deal ofdahragehto apparatus, such as spinning frames. Instead of using coldfluid for cooling the machines, I may, therefore, artificially heat thefluid to approximately the room temperature by any suitable method,

and since the permissible temperature of the machine is considerablyabove room temperature, it will not be necessary to supply muchadditional fluid to compensate for the heating pf the fluid before it issupplied to ment of; my invention, the inventionds not limited to thisparticular embodiment, and I .aim in the appended claims to cover allmodifications which do not depart from the spirit and scope of myinvention.

7 IVhatI claim as new and desire to secure by Letters Patent of theUnited States, is,

1. In a dynamo'electric machine, a stationary core structure having aplurality of holes extending therethrough for receiving a cooling fluid,and end frames clamping said core structure, each of said end frameshavin a groove registering with said holes an a channel connecting saidgroove to the exteriorof said end frame.

2. In a dynamo electric machine, a stationary core structure havin ap1urality of holes extending therethrou Ii for receiving a cooling fluidand arrange "in a circle, and end frames clamping said core structure,each of said end frames having a circular groove registering with saidholes and a channel connectin said groove to the exterior of said endIrame. k

3. In a dynamo electricmachine, a stationary laminated core structurehaving a plurality of holes extending therethrough for receivi a coolingfluid, the interior walls of sai holes bein coated or covered so thatcooling fluid Wll not leak out between the laminations, and end framesclam ing said core structure, each of said end rames having a grooveregistering with said holes and a channel connecting said groove to theexterior of said end frame.

4. In a dynamo electric machine, a stationary laminated core structurehaving a plurality of holes extending therethrough or receiving. acoolin fiuidarran ed in a circle, the interior w s of said ho es beincoated or covered so that cooling fluid w' not leak out between thelaminations, and end frames clamping said core structure, each ofsaidend frames having a circular groove registering with said holes anda channel connectin said groove to the exterior of said end rame.

In witness whereof, I have hereunto set my hand this 25th da of April,1910. I

OHN B. WIARD. Witnesses:

Jomf A. MCMAN'US, J13, CHARLES A. BARNARD.

